Neo-modified Koyanagi technique for the single-stage repair of proximal hypospadias.
OBJECTIVE
To retrospectively analyze the results of a modification of the Koyanagi hypospadias repair developed to reduce complications.


METHODS
Twelve boys underwent a modified Koyanagi repair over the past 3 years. The technique included the preservation of a wide vascular pedicle for each parameatal flap. The distal urethral plate was left intact and attached on each lateral side to the medial side of each distal Koyanagi pedicle flap.


RESULTS
One boy (8%) developed a urethral fistula. There was no instance of meatal stenosis, sacculation or urethral stricture.


CONCLUSIONS
Modifying the Koyanagi repair by preserving a wide vascular pedicle for the distal skin flaps and utilizing the distal urethral plate as the base for the distal neourethra has lowered the incidence of complications. This technique is a suitable alternative to a two-stage approach for the correction of proximal hypospadias.
Hayashi
Yutaro
Y
Department of Nephro-urology, Nagoya City University, Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan. yutaro@med.nagoya-cu.ac.jp
Kojima
Yoshiyuki
Y
Mizuno
Kentaro
K
Nakane
Akihiro
A
Kurokawa
Satoshi
S
Maruyama
Tetsuji
T
Kohri
Kenjiro
K